Method of forming brake-beam fulcrums.



No. 843,659. v PATENTED EEB.12, 190'7.

E. W. BAUMANN.

METHOD 0E EOEMING BRAKE BEAM FULGRUMS.

APPLIOATloN FILED MAR. 27. 1906.

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No. 843,659. PATENTED FEB. 12, 1907.'

F. W. BAUMANN. METHOD 0F PORMING BRAKE BEAM FULGRUMS.

.APPLICATION FILED MAB.27. 1906. l

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METHOD 0F EOEMING BRAKE BEAM EU LLLLL S.

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for carrying out the first step of my improved Fig. 2, showing the dies closed. Fig. 8 is a UNITED 'STATES PATENT OFFICE.

FREDERICK W. BAUMANN, OP MONTOOTT'ROROUGII, PENNSYLVANIA, As- SIGNOR To OLIVER IRON AND STEEL COMPANY, OE PITTSRURG, PENN- SYLVANIA, A CORPORATION OF PENNSYLVANIA. l I

METHOD oF `For-zwllNc-I BRAKE-BEAM FuLcnuMs'.

Specification of Letters Patent.

Application led March 27, 1906. Serial No. 308,295.

NO. 843,659. Patented Feb. 12, 1907.

T all whom t may concern: I

Be it known that I, FREDERICK-W. BAU- l of MANN, a resident of Montcott borough,lin the county of Allegheny and State of lzennsylvania, have invented a new and useful Improvement in Methods of Forming Brake- Beam Fulcrums and I do hereby declarethe following to be a full, clear, and exact description thereof.

My invention relates to a method of manufacturing parts of brake-beam fulcrums.

In that type of brake-beam ulcrums in which the ulcrum is formed of two parts shaped so that when united they form a recess to receive the flange of an I-beam'forming the brake-beam, as well as anangular recess to receive the brake-lever, it has been a matter of great difficulty to obtainl the proper shape of the parts without a number of operations which distorted and weakened the metal at'certain points where said parts are made of Wrought-metal.

The object of my invention is to provide a method by means of which the operations required for shaping the parts forming the fulcrum are reduced, thereby reducing the strain on the metal and at the same time the time and labor.

In the accompanying drawings, Figure 1 represents a plan view of a suitable machine Like numerals indicate like parts in each the figures. In the drawings the numeral 2 designates the framework of a suitable swaging-machine, 1n which is journaled the shaft 3, driven .by power applied to the pulley 4. The Shaftis provided with the iiy-wheel 5. At one end of the shaft 3 is the pinion 6, which meshes with the gear 7. Arranged eccentrically of the gear 7 are wrist-pins 7 to which the pitmen 8 are connected and to the cross-head 9, to which the die 10 is secured. vSecured to the bed-plate of the machine opposite the moving die 10 is the stationary die -11. The die 10 has lsecured to one end thereof the stop or gage 12. The working face of the die 10 has the recess 10a, formed therein with the overhanging portion 10b. Below the overhanging ortion 10b is the projecting portion 10c, wit the inclined face 10d', forming part of the recess 10a. The rojecting portion 10o is provided with the beveled lower face 10e.. Adjacent to the overhanging portion 1()1D and projecting por- .'tion 10c is the projecting rounded or curved rib 10t with'the depressions 10" on each side thereof. Beyond the curved rib 10f is the overhangng portion 10g. The opposite die 11 works in conjunction with the die 10, and opposite the overhanging portion 10b of the die 10 is the corresponding overhanging portion 11a and a portion 11b, which has a beveled face 11c correspondin to the be'veled face 10", so that when the ies are closed method. Fig. 2 is an enlarged plan View of the dies. Fig. 3 is an end view of same. Fig. 4 is an opposite end view. Fig. 5 is a cross-section on the line 5 5, Fig. 2, showing the dies closed. Fig. 6 is a cross-section on the line 6 6, Fig.V 2, showing the dies closed. Fig. 7 is a cross-Section on the line 7 7,

sume the position indicated in Fig. 6.

0 t e die 11 has the projecting portion 11d, whichwhen these dies are close ,as indicated in Fig. 5, compels the metal to assume the osition indicated in said iigure, the metal being crowded at this point 1nto-the depression 10i', so as to conform to the curved face of the portion 10f of the die 10. The die 11 vertical elevation of the apparatus for forming the Second step of my improved method. Fig. 9 shows a planview of the dies side by side. Fig. 10 is an end view of the dies. Fig. 11 is a section on the line 11 11, Fig. -9. Fig. 12 is a section on the line 12 12, Fig. 9. Fig. 13 is` a vertical section through the dies on the line 13 13, Fig. 12. Figs.14 and 15 show the views of theV blank after the first operation. Figs. 16 and 17 show it in the finished form, and Fig. 18 is a view ofthe I'inished fulcrum in the construction of which the above parts are used.

with the beveled face 10h of the die 10, so that when the dies are closed,vas indicated in Fig. 7, the metal at that portion of the dies will assume the position there indicated.

In Fig. 8 the numeral 14 indicates a suit- 18, moving in suitable guides 19. Below is they will togethervcompel the metal to asposite the curved portion 10f of the die has the portion 1 1e, which acts in conjunction IOO able drop-board hammer carrying the die j ,the projection 26, with the inclined face 26a corresponding to the inclined face 23 of the die 20. It a so has a slight V-shaped recess 27 to receive one edge of the bar, as indicated in Fig. 12. When the dies are brought close to ether, as indicated in Fig. 12, the metal wi l be compelled to assume the position indip cated therein.

In carrying out my improved method with the above-described ap aratus I first take a bar of Wrought metal o suitable dimensions and havin heated same introduce it between the dies o the machine indicatedin Fig. 1,

the forward end of the bar abutting against A the stop 12. Power is then applied to move the die 10 toward the die 11, whereupon the opposite faces of the dies act as indicated in the several cross-sectional views 5, 6, and 7 to impart the shape to the metal, as indicated in said figures. For instance, the overhanging portion 1()b and 11, together with the portlons 10and 11b, act to throw that poition 31 of the straight bar in contact with said faces into the position indicated in Fig. 6, or slightly oblique to its original sha e. That portion of the bar which is acted on y the curved portion 10 and the portion 11d will be forced to assume a curved shape, such as indicated at 28 in Figs. 14 and 15 of the,

drawings. The pressure being applied to the edges of the metal, themetal at this particular point will be forced 11p over the curved swa e-b1ock`10f, so that when the portion 30 of said j ar is twisted, as hereinafter set forth, the bend or curve 28 will be along one edge of the bar and will form a depression widest and -deepest along that edge and gradually de'- creasing inwidth and depth toward the opposite edge, where at 29 there is practically no bend whatever; but the metal at this oint is slightly bulged, as at 33, to form a s oulder, which is due to the twisting of the portion 30 of the bar. This portion 30 of the bar is the part that is acted on by the portions 10g and 11e, and these portions of the dies give the twist to this portion of the bar so as to throw it obliquely to the original line on which the bar was presented to the dies.

The bar therefore as it comes from this flrst operation has the shape indicated 111 Flgs. 14 and 15, with the end portions 30 and 31 turned obliquely to each other and the in-v termediate curved portion 28 forming the groove or vdepression 32. The blank," as shown in Figs.,14 and 15, is then placed 1n the position in the machine 14 to be'operated upon by the dies 18 and 20. As indicated in dotted lines, Fig. 9, the blank is laid on the lower die, with the portion 31 resting in the'recess 21 of the die 18 and with the curved portion 28 over the groove or depression 22 and the portion 30 resting in the recess 17 against the inclined face 23. With.

the blank in this position the upper die is then lowered, whereupon the flat portion 24 comes down and holds the portion 31 in the fiat recess 21, while the rib or tongue 25 enters the de ressi'on 32 in the blank and forces the metal own into the position indicatedv in Fig. 11, the face 26 conforming to the face 23, and giving the portion 30 ol the blank by further twisting 'it' the position indicated in Fig. 12. In this manner the groove 32 of the blank after the iirst operation, as indicated in Fi 13, is deepened as indicated in Figs. 16 an 17 as at 34. This action of the rib or tongue 25, while it acts to deepen and narrow the roove in the blank, also acts to draw up an shorten the blank, so that the portion 31 is practically straight, while the portion 30 is oblique thereto.

VBy my improved method I am able to produce the parts shaped to form a brake-beam fulcrum of the type indicated in Fig. 18 with two operations, getting the peculiar twist to the blank to form the recess or groove therein` without weakening the, metal.

What I claim is- The method of forming parts for brakebeam fulcrums consisting in subjecting a straight bar to ressure applied to its edges between dies, t ereby twisting said bar to throw op osite portions obliquely to each other, at t e same time forming between said portions a rounded depression deepest and widest along one edge of said bar and gradually decreasing in width and depth to the opposite edge7 and finally subjecting said bar to further pressure increasing the depth of said depression and decreasing its Width.

In testimony whereof I, the said FREDERICK W. BAUMANN, have hereunto set my hand.

` FREDERICK W.,BAUMANN. Witnesses:

ROBERT (l. ToTTEN, G. C. RAYMOND.

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